Most aftermarket stereos will work.
Most likely it is built into the dash where your stereo controls are. If not Go the the trunk and remove the carpet on the sidewall on the drivers side that is where the actual stereo is.
Needing the location of the flasher on a 2004 Taurus
The 2004 Ford Taurus has 12 valves.
The 2004 Ford Taurus has a V6 engine.
The 2004 Ford Taurus has overhead valves (OHV).
The 2004 Ford Taurus has a 4-speed automatic.
The 2004 Ford Taurus is a gas-powered vehicle.
The 2004 Ford Taurus is 16 ft. 5.6 in. (197.6 in.) long.
The height of the 2004 Ford Taurus is 4 ft. 7.5 in. (55.5 in.).
The 2004 Ford Taurus runs on regular unleaded.
The 2004 Ford Taurus's turning circle is 39.7 ft..
The curb weight of the 2004 Ford Taurus is 3306 lbs..